Ability to retrieve traceId for observability in routes

[christian-morin]

When adding the camel-quarkus-opentracing dependency, camel will output Jaeger traces using the Quarkus Opentracing tracer. However, it seems it initiates the Span after the Routes have finished?

When using Opentracing with Quarkus, I'm able to do for e.g:

@Path("/")
public class ApplicationResource {

  @Inject
  Tracer tracer;

  @GET
  @Path("/quarkus-jaeger")
  public Response quarkusJaeger() {

    JaegerSpanContext spanCtx = ((JaegerSpan)tracer.activeSpan()).context();

    log.info("Quarkus Jaeger traceId=" + spanCtx.getTraceId());

    return Response.status(Response.Status.OK).build();
  }

And it'll print the traceId:

ApplicationResource : Quarkus Jaeger traceId=a962e2a875c9248c

Also if I add the log format for e.g:

quarkus:
  log:
    console:
      format: "%d{yyyy-MM-dd HH:mm:ss.SSS} %5p [%X{traceId},%X{spanId},%X{sampled}] %i --- [%15.15t] %c{2.} : %s%e%n"

It'll print the current traceId and spanId in every log output:

2021-06-17 11:24:34.597  INFO [a962e2a875c9248c,a962e2a875c9248c,true] 4314 --- [executor-thread] se.in.ApplicationResource : Quarkus Jaeger traceId=a962e2a875c9248c

This is very beneficial as I'm able to go from log to trace very easily. When logging an error I can quickly go from that error log to see the entire trace from the traceId.

But in Camel-Quarkus, it seems there's no current activeSpan() when processing routes? Nowhere in my code/setup am I able to printout/retrieve the current traceId. And the logs doesn't include the traceId by default when using the log-format above. Is this an architectural limitation, or possible to initiate an active Span to be used inside a Route somehow?

[jamesnetherton]

With a bean or processor where you have access to the exchange, something like this may work from a route:

.process(new Processor() {
    @Override
    public void process(Exchange exchange) throws Exception {
        OpenTracingSpanAdapter adapter = (OpenTracingSpanAdapter) ActiveSpanManager.getSpan(exchange);
        System.out.println("=======>" + adapter.getOpenTracingSpan().context().toTraceId());
    }
})

[christian-morin]

Yes, that worked! The context on my OpenTracingSpanAdapter didn't have a toTraceId() method though, but casting the Span to a JaegerSpan made me able to retrieve it.

OpenTracingSpanAdapter adapter = (OpenTracingSpanAdapter) ActiveSpanManager.getSpan(exchange);
JaegerSpanContext spanCtx = ((JaegerSpan)adapter.getOpenTracingSpan()).context();
System.out.println("=======>" + spanCtx.getTraceId());

[jamesnetherton]

Glad it worked for you! If there's anything else required for this issue, feel free to reopen it.